input_common: Rewrite main and add the new drivers

src/input_common/main.h

@@ -25,47 +25,26 @@ namespace Settings::NativeMotion {
 enum Values : int;
 }
 
-namespace MouseInput {
+namespace InputCommon {
+class Keyboard;
 class Mouse;
-}
+class TouchScreen;
+struct MappingData;
+} // namespace InputCommon
 
-namespace TasInput {
+namespace InputCommon::TasInput {
 class Tas;
-}
+} // namespace InputCommon::TasInput
 
 namespace InputCommon {
 namespace Polling {
-
-enum class DeviceType { Button, AnalogPreferred, Motion };
-
 /// Type of input desired for mapping purposes
 enum class InputType { None, Button, Stick, Motion, Touch };
-
-/**
- * A class that can be used to get inputs from an input device like controllers without having to
- * poll the device's status yourself
- */
-class DevicePoller {
-public:
-    virtual ~DevicePoller() = default;
-    /// Setup and start polling for inputs, should be called before GetNextInput
-    /// If a device_id is provided, events should be filtered to only include events from this
-    /// device id
-    virtual void Start(const std::string& device_id = "") = 0;
-    /// Stop polling
-    virtual void Stop() = 0;
-    /**
-     * Every call to this function returns the next input recorded since calling Start
-     * @return A ParamPackage of the recorded input, which can be used to create an InputDevice.
-     *         If there has been no input, the package is empty
-     */
-    virtual Common::ParamPackage GetNextInput() = 0;
-};
 } // namespace Polling
 
 /**
  * Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default
- * mapping for the device. This is currently only implemented for the SDL backend devices.
+ * mapping for the device.
  */
 using AnalogMapping = std::unordered_map<Settings::NativeAnalog::Values, Common::ParamPackage>;
 using ButtonMapping = std::unordered_map<Settings::NativeButton::Values, Common::ParamPackage>;
@@ -88,10 +67,34 @@ public:
     /// Unregisters all built-in input device factories and shuts them down.
     void Shutdown();
 
+    /// Retrieves the underlying keyboard device.
+    [[nodiscard]] Keyboard* GetKeyboard();
+
+    /// Retrieves the underlying keyboard device.
+    [[nodiscard]] const Keyboard* GetKeyboard() const;
+
+    /// Retrieves the underlying mouse device.
+    [[nodiscard]] Mouse* GetMouse();
+
+    /// Retrieves the underlying mouse device.
+    [[nodiscard]] const Mouse* GetMouse() const;
+
+    /// Retrieves the underlying touch screen device.
+    [[nodiscard]] TouchScreen* GetTouchScreen();
+
+    /// Retrieves the underlying touch screen device.
+    [[nodiscard]] const TouchScreen* GetTouchScreen() const;
+
+    /// Retrieves the underlying tas input device.
+    [[nodiscard]] TasInput::Tas* GetTas();
+
+    /// Retrieves the underlying  tas input  device.
+    [[nodiscard]] const TasInput::Tas* GetTas() const;
+
     /**
      * Returns all available input devices that this Factory can create a new device with.
-     * Each returned ParamPackage should have a `display` field used for display, a class field for
-     * backends to determine if this backend is meant to service the request and any other
+     * Each returned ParamPackage should have a `display` field used for display, a `engine` field
+     * for backends to determine if this backend is meant to service the request and any other
      * information needed to identify this in the backend later.
      */
     [[nodiscard]] std::vector<Common::ParamPackage> GetInputDevices() const;
@@ -105,23 +108,33 @@ public:
     /// Retrieves the motion mappings for the given device.
     [[nodiscard]] MotionMapping GetMotionMappingForDevice(const Common::ParamPackage& device) const;
 
-    /// Reloads the input devices
+    /// Returns a string contaning the name of the button from the input engine.
+    [[nodiscard]] std::string GetButtonName(const Common::ParamPackage& params) const;
+
+    /// Returns true if device is a controller.
+    [[nodiscard]] bool IsController(const Common::ParamPackage& params) const;
+
+    /// Reloads the input devices.
     void ReloadInputDevices();
 
-    /// Get all DevicePoller from all backends for a specific device type
-    [[nodiscard]] std::vector<std::unique_ptr<Polling::DevicePoller>> GetPollers(
-        Polling::DeviceType type) const;
+    /// Start polling from all backends for a desired input type.
+    void BeginMapping(Polling::InputType type);
+
+    /// Returns an input event with mapping information.
+    [[nodiscard]] const Common::ParamPackage GetNextInput() const;
+
+    /// Stop polling from all backends.
+    void StopMapping() const;
 
 private:
     struct Impl;
     std::unique_ptr<Impl> impl;
 };
 
-/// Generates a serialized param package for creating a keyboard button device
+/// Generates a serialized param package for creating a keyboard button device.
 std::string GenerateKeyboardParam(int key_code);
 
-/// Generates a serialized param package for creating an analog device taking input from keyboard
+/// Generates a serialized param package for creating an analog device taking input from keyboard.
 std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
                                         int key_modifier, float modifier_scale);
-
 } // namespace InputCommon